BIOLOGIC
INSIGHTS
⚡ NEET 2025 MUST-KNOW
PHOTOSYNTHESIS WARRIOR GUIDE
Last-Minute Revision | 100% NCERT + 3 Topper Secrets
🚨 NEET ALERT!
Photorespiration asked 3 years consecutively - Master it now!
💎 3 GOLDEN FACTS (NEET 2019-24)
18
ATP per glucose
5:3
Photon:ATP ratio
25%
C3 energy loss
⚖️ ULTIMATE PHOTOSYNTHESIS COMPARISON
| Parameter | C3 | C4 | CAM |
|---|---|---|---|
| First Product | PGA (3C) | OAA (4C) | Malate (4C) |
| Rubisco Activity | High | Only in BS cells | Night only |
| NEET Frequency | 3 Q/yr | 2 Q/yr | 1 Q/2yr |
🧬 Z-Scheme Decoded
PSII → Pheo → PQ → Cyt → PC → PSI → Fd → NADP+
680nm → 700nm | H₂O split at PSII
NEET hack: "PhotoPETE (PSII) → CYTOchrome → PhotoPETE (PSI)"
🎯 5-Minute PYQ Drill
Q. (NEET 2023) Where does photophosphorylation occur?
A. Thylakoid membrane
Q. (NEET 2022) C4 plants are more efficient because:
A. No photorespiration + Kranz anatomy
🔑 ABBREVIATIONS KEY:
PSII/PSI: Photosystem II/I
ETC: Electron Transport Chain
PGA: 3-Phosphoglycerate
OAA: Oxaloacetate
RuBP: Ribulose-1,5-bisphosphate
PEP: Phosphoenolpyruvate
Pheo: Pheophytin
PQ: Plastoquinone
Cyt: Cytochrome
PC: Plastocyanin
Fd: Ferredoxin
BS: Bundle Sheath
🚨 NEET ALERT!
Photorespiration asked 3 years consecutively - Master it now!
